Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-08-17
Astronomy and Astrophysics
Astrophysics
Accepted for publication in the PASP (to appear in the October 2004 issue)
Scientific paper
10.1086/425107
In order to study the small-scale structure of the hot interstellar gas, we obtained Far Ultraviolet Spectroscopic Explorer interstellar O VI interstellar absorption spectra of 4 four post-extreme horizontal branch stars in the globular cluster NGC 6752 [(l,b) = (336.50,-25.63), d = 3.9 kpc, z= -1.7 kpc]. The good quality spectra of these stars allow us to measure both lines of the O VI doublet at 1031.926 \AA and 1037.617 \AA. The close proximity of these stars permits us to probe the hot interstellar gas over angular scale of only $2\farcm2 - 8\farcm9$, corresponding to spatial scales $\la 2.5-10.1$ pc. On these scales we detect no variations in the O VI column density and velocity distribution. The average column density is log
Howk Chris J.
Lehner Nicholas
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